Merge "Mark implicit rules as obsolete"

	source $(PRIVATE_ENV); a/b/c/package.sh ...

```

## Implicit make rules are deprecated {#implicit_rules}

## Implicit make rules are obsolete {#implicit_rules}

Implicit rules look something like the following:

	...

```

These can have wide ranging effects across unrelated modules, so they're now deprecated. Instead, use static pattern rules, which are similar, but explicitly match the specified outputs:

These can have wide ranging effects across unrelated modules, so they're now obsolete. Instead, use static pattern rules, which are similar, but explicitly match the specified outputs:

``` make

libs := $(foreach lib,libfoo libbar,$(TARGET_OUT_SHARED_LIBRARIES)/$(lib)_vendor.so)